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. (No Model.)

H.A.GHASE. SYSTEM FOR TRANSMITTING SIGNALS.

Patented Mar. 29, 18.92. I

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'NrTE' STATES HENRY A. CHASE, OF

BOSTON,.MASSAOHUSETTS, ASSIGNOR TO ALBERT- TVATTS, OF SAME PLACE.

SYSTEM FOR TRANSMITTING SIGNALS.

I SPECIFICATION forming part of Letters Patent No. 471,534, dated March 29, 1892. Application filed November 27,1891. Serial No 413,154. (No model.)

To all whom it may concern:

Be it known that I, HENRY A. CHASE, residing in Boston, county of Suffolk, and State of Massachusetts, have invented an Improvement in Systems for Transmitting Signals, of which the following descriptiomin connection with the accompanying drawings, is a spe'cifi cation, like letters on the drawings representing like parts.

This invention relates to a system for transmitting signals from one point or station to another point or station, and has for its object to provide a signaling system in which a single signal-wheel may transmit its signal without additions thereto, subtractions therefrom, repetitions thereof, or change in its character'over two different-paths for two diiferent purposes.

My invention in a system for transmitting signals therefore consists in the combination of the following instrumentalities, viz: a normally-closed metallic circuit, a receiving-instrument included therein, a normally-open auxiliary circuit connected to the metallic circuit, a signal-wheel included in the metallic circuit and provided with only the number of teeth or notches necessary to indicate a definite signal or number, and means to close the normally-open auxiliary circuit to complete the metallic circuit when the latter is opened by the signal-wheel, whereby the signal-wheel may transmit the definite signal indicated by all its teeth or notches over the metallic circuit for one purpose,.and whereby the same signal-wheel may transmit the same signal indicated by all its teeth or notches over the auxiliary circuit for a different purpose, substantially as will be described.

Other features of my invention will be pointed out in the claims at the end of this specification.

The drawing shows in diagram a sufficien-t portion of a signaling system embodying my invention to enable it to be understood.

In accordance with my invention a metallic circuit extending from a trausmitting-sta tion A to a receiving station A has located init at the station A a battery aand preferably two relays a a The battery ahas connected to one of its poles one line-wire a of the metallic circuit and to its other pole the.

other line-wire a, in which the relays a a are located, as herein shown. The line-wire a is electrically connected to a signal-transmitting wheelerlocated at the transmitting station A, and'thesaid wheel is provided on its periphery; with a series ofnotches or teeth a, indicative of a number or signal'corre- 'ponding to the number of the transmittingmechanism at the station A, the saidwheel being connected to the line-wire a as herein shown, by the branch wire I). The signalwheel a has co-operating with it a pen or brush I), joined by wire b to the other line- Wire w, the said pen being .normallyin contaot with the signal-wheel to complete the normally-closed metallic circuit extended from the transmitting-station A station A.

The signal-wheel a inpractice may be re- .volved by any usual motor mechanism to cause the metallic circuit to be opened and closed to produce operation of the receivingrelays a 0, The signal-wheel (1?, when operated as described, produces at the receiving-station a signal indicative of one purpose, which, for instance, may be supposed tobe an alarm.

It is theobject of this invention to enable the signal-wheel of to be employed toproduce 'the same signal at the receiving-station and not indicate an alarm, but an entirely different purpose-as, for instance, a test-signal. This feature is accomplished, as herein shown, by connecting to one line-wire, as a a resistance c, joined, as herein shown, by an auxilto the receivingiary circuitwire c"to a circuit-terminal c with which co-operates a contact-arm 0 secured to a shaft 0 having fast to itapointer 0 the other line-wire a? being connected, as

' shown, by anauxiliary circuit-wire c to a cir- -cuit-terminal c, with which the contact-arm also co-operates'. Normally the auxiliary circuit is opened by the contact-arm c being out of engagement with the circuit-terminals c 0 the pointer at such time being in its normal position. (Shown in the drawing and marked alarm.) While the pointer is in this position, the signal-wheel may be operated to produce an alarm-signal, and if the pointer is moved to the position marked test the auxiliary circuit is closed by the contact-arm a being brought into contact with ted lines.

the circuit-terminals c c, as indicated by dot- VVhen the pointer is in its dottedline position, the signal-wheel may be operated to produce the test-signal, which, as

before stated, is precisely the same as the alarm-signal, but an alarm-signal is not produced, owing to the fact that the alarm-relay V a does not respond to a weak current caused by the interposition of the resistancec at each break or notch in the signal-wheel, and only the test-relay a is operated by the transmission of-the test-signal. When in the revolution of the signal-wheel in the transmission of the test-signal a break or notch is brought beneath the pen I), the metallic circuit is still completed through the resistance a and auxiliary circuit-wires c 0 The relay a has its armature adjusted so as the relay a has its armature adjusted so. as to respond to total interruptions and to a weakening of the current. g Iclaimg 1. I11 a system for transmitting signals, the combination of the following instrumental? ties, viz: a normally-closed metallic circuit, a receiving-instrumentincluded therein, a signal-wheel provided with only the number of.

teeth or notches necessary to indicate a delinite signal or number connected to one side or line-wire of the metallic circuit, a pen or brush in engagement with thev signalewheel and connected to the other side orlinewireof the metallic circuit to normally complete the said'metallic circuit, a normally-open auxiliary circuit having one line-wire connected to the signal-wheel and its other line-wire connected to the pen orbrushco-operating with the signal-wheel, and a circuit-controller to complete the normally-open'auxiliary circuit and thereby maintain closed when the latter is opened by a notch to respond only to total interruptions in the metallic circuit, andv the metallic circuit or tooth on the signal-wheel, whereby the teeth or notches on the signal-wheel may transmit a signal indicated by all the teeth or notches over the metallic circuit when the auxiliary circuit is open and whereby the same teeth or notches may transmit the same signal indicated by all the teethor notches on the signal-wheel over the combined metallic and auxiliary circuit when the said aux liary circuit is closed and the metallic c rcuit opened at the teeth or notches on the signalwheel, substantially as described.

2. In a system for transmitting signals, the

combination of the following instrumentalities, viz: a normally-closed metallic circult, receiving-relays ct a included therein, a signal-wheel connected to one line-wire of the metallic circuit and. provided with only the number ofteeth or notches necessary to indicate a definite signal or number, a pen or brush normally in contact With'the said Wheel and connected to the other line-wire to c omplete the said metallic circuit, an auxiliary 'circuit'connected'to both sides of the metallic circuit and, provided with normally-open circuit-terminals, a resistance in the auxiliary circuit, a contact-arm cooperating with the said circuit-terminals, anda pointer to operate said-contact-arm, whereby the said signalwheel may-transmit the definitesignal, indicated by all its teeth or'notches, over the metallic circuit for one purpose when the polnter is in one position, and whereby the same sigrial-wheel may transmit the same s1gnal, 1nd1- cated by all its teeth or notches, over the auxiliar'y circuit for another purpose when the pointer is in a different position, substantially as described.

In testimony whereof I have signed my 7 name to this specification'in the presence of two subscribing witnesses.

HENRY A. CHASE. Witnesses:

JAs. H. CHURCHILL, SADIE O. FEARING. 

